Title: Reproducing method and device for holographic memory
Application Number: 200480034582 Application Date: 2004.11.10
Publication Number: 1886785 Publication Date: 2006.12.27
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G11B7/0065,G11B7/09,G11B7/135,G03H1/22
Applicant(s) Name: TDK Corp. Address:
Inventor(s) Name: Tsukagoshi Takuya, Yoshinari Jiro, Miura Hideaki
Attorney & Agent: lei zhigang
Abstract:
     A method and a device for servo-controlling a reproduction position without reducing the recording capacity of a holographic recording medium. When data is reproduced from a holographic recording medium (18), part of a reproduction light is applied as a servo light to the recording layer (18A) of the holographic recording medium (18) from the opposite side to the reproduction light (reference light) on the same optical axis as that of the reproduction light, and its diffraction light is detected by a photodetector (26C) via a polymerization beam splitter (26B).
Time: 6